About: http://webisa.webdatacommons.org/444567286

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	???This level of contamination [1 ??g] becomes serious for tiny sample sizes, say, 1 mg or less, especially if the sample is old.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com